In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs.
CVSS Details
- CVSS 3.1 Base Score: 8.4
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade ntfs-3g | Apr 30, 2026 | Apr 21, 2026 |
| Debian | — | Upgrade ntfs-3g | Apr 23, 2026 | Apr 23, 2026 |
| Gentoo Linux | — | Upgrade sys-fs/ntfs3g. | Aug 16, 2026 | Aug 16, 2026 |
| Ubuntu | — | Upgrade ntfs-3g | Apr 23, 2026 | Apr 21, 2026 |
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